Insulating unit for deadening vibration and sound



April 17, 1928.

S. ROSENZWEIG INSULATING UNIT FOR DEADENING VIBRATION AND SOUND FiledAug. 25, 1925 2 Sheets-Sheet l 3 Yvuc'n or 5. R0senz weig,

April 17, 1928.

S. ROSENZWEIG INSULATING UNIT FOR DEADFINING VIBRATION AND SOUND FiledAug. 25, 1925 2 Sheets-Sheet 2 gM-unfloz SiRosenzweig,

anew q Patented Apr. 17, 1928.

UNITED STATES SIEGFBIED ROSENZ'WEIG, OF NEW YORK, N. Y.

INSULATING UNIT FOR DEADENING VIBRATION AND SOUND.

Application filed August 25, 1925. Serial No. 52,893.

This invention relates to a novel sound and vibration insulating unitadapted to be psitioned between machinery and the floor or other supportto deaden and prevent the 6 transmission of sound and vibration to thebuilding. In making'units'of the type referred to, it s preferable touse cork, which, because of its natural suberous characteristicspossesses l0 superior sound deadening properties thereby reducing noise,while also having the desirable capacity of supporting great weight orloads with a persisting or enduring cushion effect. In the use of cork,however, it is preferable to combine the same with suitablereinforcement such for example as illustrated in the patent to Genest,et al., 971,369, Sept. 27, 1910, wherein sections of cork are heldtogether by an iron band and intermediate locking plates thereby holdingthe cork against lateral spreading and increasing its verticalresistance to superposed loads. Also, it has been found that severalhorizontal layers of cork are more efficient than solid blocks or slabsof the same thickness, yet on the other hand cork blocks in this formcannot be conveniently held in position because it is necessary toposition the iron band at the central part of each so layer of cork inorder to leave ends of cork projecting above and below the band forhearing purposes, and so that the frame will not engage the support andthe article to be supported.

Accordingly, the present invention has primarily in view the eliminationof the practical objections to combining horizontal layers of cork, orother sound and vibration absorbing material, by providing a novelarrangement of the materials whereby maximum efficiency may be obtainedtherefrom while at the same time the manner of making and assembling theconstruction is advantageous from both the standpoint of manufacturing wand installation for use.

With the above and other objects in view which will more readily appearas the nature of the invention is better understood, the same consistsin the novel construction,

combination and arrangement of parts hereinafter more fully described,illustrated and claimed.

A preferred and practical embodiment of the invention is shown in theaccompanying drawings, in which Figure 1 is a vertical cross-sectionalview of an insulating unit constructed in accord ance with the presentinvention.

Figure 2 is a top plan view thereof.

Figure 3 is a cross-sectional view of a modified form of construction.

Figure 4 is a plan view similar to Fig. 2 illustrating a modifiedarrangement of clamping bands for the cork frame.

Figure 5 is a detail cross-section 0n the line 5-5 of Fig. 4.

Figure 6 is a detail cross-sectional view of a further modification ofthe invention.

Similar reference characters designate corresponding parts throughoutthe several figures of the drawings.

In carrying the invention into effect it is proposed to provide aninsulating and cushioning unit for supporting machinery and the likewhich consists primarily of a cork frame designated generally as A and acentral filler portion B consisting of one or more sections or pieces ofsuitable material which are held together by a metallic clamping band Cor its equivalent.

As will be observed from Figures 1 and 2 of the drawings, the cork frameA preferably consists of the side strips 1-1 and the end strips 22 ofcork whose height and thickness are largely determined by thespecifications of the installation wherein the unit is to be used. Thesestrips 1 and 2 are arranged about the filler section B which in Figures1 and 2 consists of the cork slabs 33 whose combined thickness ispreferably equal to the depth of the cork strips 1 and 2 forming theframe A, thereby roviding a unit wherein the surface of the ller sectionis flush with the surfaces of the cork frame 11, and also acts as a loadsupporting member.

As will be observed from Figure 1 the cork frame A is held in positionabout the filler B by the metallic clamping band C which embraces themedial portion of the cork frame and exerts its clamping effect on theframe strips 1 and 2 which in turn evenly clamp the side edges of bothcork slabs 33 thereby effectively distributing the clamping effect ofthe band C to the cork slabs 3.

This multiple-section filler B provides a very efiicient and practicalconstruction wherein a cork frame as well as a cork filler section isused.

However, under some conditions of use where the load carrying capacityis not so great, and a more economical construction may be used withsatisfactory results, it is proposed to use the arrangement shown insections certain of whic igure 3 of the drawings. In this form ofconstruction the cork frame A and encircling band C are used inconjunction with a filler section B made of a sound deadening ma terialcheaper than cork. This material may be in one piece or several piecesor sheets of any sound deadening material available for the urpose, suchfor example as felt, or the like. In this case the sound deadeningmaterial need not necessarily be flush with the upper surface of thecork frame A.- The cork frame primarily carries the load or weight ofthe machine while the filler section B may be non-loading carrying butacts as a sound deadener and prevents the setting up 'of a resonant ordrum effect within the frame A.

Accordingly, under circumstances where absorption of noise is of greaterimportance than load carrying capacity the construction 'shown in Fig. 3may be used. As a matter of fact there is probably no material whichpossesses both the resistance to vibration and deadening properties ofsound as cork, but there are other materials which are very efficientsound deadeners but lack load carryingcapacity, and for that reason itis not only unwise but detrimental to place machiner on materials whichonly deaden the soun I-Iowever, by the use of the cork frame shown inFigure 3 the wei ht of the machinery rests on the frame rat er than onthe sound deadening material, whereby a much cheaper material than corkmay be used.

Figure 4 illustrates the use of iron strips about the end sections 2 ofthe cork frame thereby to give, the same added vertical re sistance tosuperposed loads.

Figure 6 of the drawings illustrates a further modification of theinvention wherein the frame A of cork surrounds a multiplesection fillerB wherein the sections 4 and 5 are strips of different heightalternately arranged so that the strips 4 come below the plane of the toof the frame A while the strips 5 are of t e same height as the stripsforming the frame A, thereby providing a filler section B containin amultiplicity of i come into play sooner than others under differentloading conditions. In this construction the frame A is held about thefiller section B by the clamping band C in the usual manner.

From the foregoing it will be apparent that the distin uishingcharacteristic of the present invention resides in the provision of anoutside frame A consisting of strips -ing a load sustaining frameconsisting of cork which act as a container for a plurality of pieces ofcork, and constitute the primary load carrying elements of the unit,while the central portion thereof which 1s surrounded by the frameprovides asound deadening center which may or may not have load carryingcharacteristics, the primary object in the latter case bein to deadenthe sound while the frame mem ers carry the load.

Without further description it is thought that the features andadvantages of the invention will be readily apparent to those skilled inthe art, and it will of course be understood that changes in the form,proportion and minor details of construction may be resorted to withoutdeparting from the spirit of the invention or scope of the appendedclaims.

I claim:

1. An insulatin unit for preventing transmission of vibration and soundto buildings and the like, comprising a load carrying frame consistingof a plurality of cork strips, and a central sound deadening portionconsisting of a plurality of horizontally disposed slabs of sounddeadening material of less combined thickness than the height of thecork strips constituting the frame, and a clamping band surrounding theframe.

2. An insulating unit for preventing transmission of vibration and soundto buildings and the like, comprising a load carrying frame consistingof a plurality of cork strips, and a central sound deadening portionincluding superposed horizontally arranged slabs of sound deadeningmaterial, said slabs being co-extensive with the space defined by theinside of the frame, and a clamping band surrounding the load carryingframe and having the joint between them concealed by the frame.

3. An insulating unit for preventing transmission of vibration and soundto buildings and the like, comprisin an outer load carrying frameconsisting o a plurality of cork strips of sufficient area to supportand sustain the load, a central sound deadenin filler consisting of aplurality of horizonta ly disposed layers of sound deadening non-loadcarrying material, the joints between said layers being concealed by theframe, and a clamping band surrounding the frame.

4. An insulatin unit for preventing transmission of vi ration and soundfrom inachinery to buildings and the like comprisof cork strips, each ofa length correspon in to a side of the unit and of a height an width toprovide suflicient area to sustain the load, and a central fillerconsisting of superposed layers of non-sectional sound deadeningmaterial having their meeting 1,oeo,au a

edges concealed by the cork strips, and a and 0. art adjacent the corkstrips being of metallic band surrounding the outer faces sounddeadening material and less load-sus- 10 of the cork strips. tainingcapacity than the cork, and a clamp- 5. An insulating unit forpreventing ing band surrounding the outer edges of the transmission ofvibrations and sounds from unit. machinery to buildings and the likecom-- In testimony whereof I hereunto afiix my prising cork strips ofgreater height than signature. their Width arranged to sustain the load,SIEGFRIED ROSENZWEIG.

